Following the Union occupation of Jackson, Mississippi, on May 14, both Confederate and Federal forces made plans for future operations. General Joseph E. Johnston, commanding all Confederate forces in Mississippi, retreated with most of his army up the Canton Road. However, he ordered Lt. Gen. John C. Pemberton, commanding three divisions totaling about 23,000 men, to leave Edwards Station and attack the Federals at Clinton. Pemberton and his generals felt that Johnston’s plan was likely to result in disaster and decided instead to attack the Union supply trains moving from Grand Gulf to Raymond. On May 16, however, Pemberton received another message from Johnston repeating his former orders. Pemberton had already started after the supply trains and was on the Raymond-Edwards Road, with his rear at a crossroads one-third mile south of the crest of Champion Hill. When he obediently ordered a countermarch, his rear, including his supply wagons, had become the vanguard of his attack.

Map from Campaigns of the Civil War: The Mississippi, by Francis Vinton Greene, 1882.

At about 7:00 a.m that day, May 16, Union forces engaged the Confederates and the Battle of Champion Hill began. Pemberton's force formed into a three mile (5 km)-long defensive line that ran southwest to northeast along a crest of a ridge overlooking Jackson Creek. Grant wrote in his Personal Memoirs, "... where Pemberton had chosen his position to receive us, whether taken by accident or design, was well selected. It is one of the highest points in that section, and commanded all the ground in the range."

Pemberton was unaware that one of the three Union columns was moving along the Jackson Road against his unprotected left flank on Champion Hill. Pemberton posted Brig. Gen. Stephen D. Lee's Alabama brigade on Champion Hill where they could watch for a Union column reported moving on the crossroads. Lee soon spotted the Union troops and they in turn saw him. If enemy force was not stopped, it would cut off the Confederates off from their Vicksburg base. Pemberton was warned of Union movement and sent troops to defend his left flank. Union forces at the Champion House moved into action and their artillery began firing.

When Grant arrived at Champion Hill at about 10:00 a.m., he ordered an attack to begin. John A. McClernand's corps attacked on the left and James B. McPherson's on the right. William T. Sherman's corps was well behind the others, departing from Jackson. By 11:30 a.m., the Union forces had reached the Confederate's main line. At 1:00 p.m., they took the crest, the troops from Carter L. Stevenson's division retiring in disorder. McPherson's corps swept forward, capturing the crossroads and closing the Jackson Road escape route. The division of John S. Bowen counterattacked in support of Stevenson, pushing the Federals back beyond the Champion Hill crest before their surge was halted. However, they were too few to hold the position. Pemberton directed William W. Loring to send forces from the southern area of the line, where they were only lightly engaged with McClernand's ineffective attack, to reinforce the Hill. However, Loring refused to budge, citing a strong Union presence to his front.

Grant now counterattacked, committing his forces that had just arrived from Clinton by way of Bolton. Pemberton's men could not resist this assault, an he ordered his men to use the one escape route still open, the Raymond Road crossing of Bakers Creek. By now, Loring had decided to obey Pemberton's order and was marching toward the fighting by a circuitous route that kept them out of action. Brig. Gen. Lloyd Tilghman's brigade formed the rearguard and held at all costs, including the death of Tilghman, killed by artillery fire. Late in the afternoon, Grant's troops seized the Bakers Creek Bridge, and by midnight they had occupied Edwards. The Confederates fell back to a defensive position at the Big Black River in front of Vicksburg. The Battle of Big Black River Bridge the next day would be the final chance for Pemberton to escape.

Champion Hill was a bloody, but decisive, Union victory. In his Personal Memoirs, Grant observed, "While a battle is raging, one can see his enemy mowed down by the thousand, or the ten thousand, with great composure; but after the battle these scenes are distressing, and one is naturally disposed to alleviate the sufferings of an enemy as a friend."

Grant criticized the lack of fighting spirit of his rival, McClernand, dissatisfied that he had not killed or captured Pemberton's entire force. McClernand's casualties were low on the Union left flank (south); McPherson's on the right constituted the bulk of the Union losses, about 2,500. The Confederates suffered about 3,800 casualties. Their effective loss included most of Loring's division, which had marched off on its own to join Joseph E. Johnston in Jackson.

Field in October 2012 from approximately the site of the Davis sketch.

Ruins of the Coker House in 2005.

Rebuilt Coker House in October 2012.

Large sections of the battlefield remain well preserved, including original roads, as evidenced by a view of the field from approximately the site of the Davis sketch. The map reference refers to the small stone historical marker at the corner of Billy Fields Road and DJ Johnson road, very central in the field.

As of October 2012, residential development had encroached only limited parts of the field, near the center, along DJ Johnson Road. Thousands of acres of the core battlefield are privately owned, listed as II.1. Class A (opportunity for comprehensive preservation, good integrity, low threat) by the Civil War Sites Advisory Commission. Discontinuous portions of the battlefield, totaling over 800 acres (3.2 km²), are owned by the State of Mississippi. These properties are being held for possible future inclusion in Vicksburg National Military Park. The Civil War Preservation Trust (CWPT) has been able to protect 402 acres (1.63 km2) of the battlefield through conservation easements and land purchases. In October 2007, Sid Champion, together with three family members who co-own the land, worked with the CWPT to craft a unique easement to protect 147 acres (0.59 km2) of the family farm comprising a key part of the field.[3]

The Coker House stands adjacent to a south portion of the Champion Hill battlefield. It was used as a hospital by Federal forces and upon departing, they extensively looted both the house and the plantation stores. Bullet holes in the front door and jamb and cannonball holes on the west side of the Coker House remained as evidence of the battle. In 1985, the historic property was donated to the Jackson Civil War Roundtable, which later deeded it to the Mississippi Department of Archives and History. As of 2005 the house was in ruins, but it has since been rebuilt using the original materials as much as possible, as it had deteriorated too far to be restored. Historical markers at the house detail the battle and the history of the house.